I know this question has been asked a million times I am sure but I need to be a Million and one! 1987 560 sel, I want to put a pair of 16" wheels on it up from my stock 15". I have been seeing all kinds of different offset numbers on different sites. So if any of you have an SEL with bigger than 15" rims on it, what offset am I looking for? Either 16" or 17". And if I go as big as a 17" will that hurt the suspension on the car? Thank you.